Oscillatory mechanisms of feedforward and feedback visual processing

Trends Neurosci. 2015 Apr;38(4):192-4. doi: 10.1016/j.tins.2015.02.006. Epub 2015 Mar 10.


Two recent monkey studies demonstrate that feedforward processing in the visual system is reflected by activity in the 40-90Hz gamma band, whereas feedback is reflected by activity in the 5-18Hz alpha and beta band. These findings can be applied to interpret human electrophysiological activity in complex visual tasks.

Publication types

  • Research Support, Non-U.S. Gov't
  • Review

MeSH terms

  • Alpha Rhythm / physiology
  • Animals
  • Beta Rhythm / physiology
  • Electroencephalography
  • Feedback, Sensory / physiology*
  • Haplorhini
  • Humans
  • Psychomotor Performance / physiology
  • Visual Cortex / physiology
  • Visual Perception / physiology*